CVE-2023-2868

criticalpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.868 · 100 %ileexploit · weaponizedDEEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 4 exploits · weaponized

Likely / severe?

86.8% (100th) EPSS

CVSS 9.8 · critical

Is it mine?

12 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

added 2023-05-26remediate by 2023-06-16

required action Apply updates per vendor instructions.

EPSS · scored 2026-10-27

Barracuda Networks ESG Appliance Improper Input Validation Vulnerability

A remote command injection vulnerability exists in the Barracuda Email Security Gateway (appliance form factor only) product effecting versions 5.1.3.001-9.2.0.006. The vulnerability arises out of a failure to comprehensively sanitize the processing of .tar file (tape archives). The vulnerability stems from incomplete input validation of a user-supplied .tar file as it pertains to the names of the files contained within the archive. As a consequence, a remote attacker can specifically format these file names in a particular manner that will result in remotely executing a system command through Perl's qx operator with the privileges of the Email Security Gateway product. This issue was fixed as part of BNSF-36456 patch. This patch was automatically applied to all customer appliances.

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19.4criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Lsecondary · ENISA EU

v3.19.4criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Lsecondary · cve-coordination@google.comexploitability 3.9 · impact 5.5

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-77USprimaryCWE-20USCWE-20USCWE-77US

ATT&CK techniques

ATT&CK techniques this enables or maps to.

exploits (4)

Public proof-of-concept and weaponised exploit code.

exploit/linux/smtp/barracuda_esg_tarfile_rceBarracuda ESG TAR Filename Command Injectionweaponized · metasploit
cashapp323232/CVE-2023-2868CVE-2023-2868cashapp323232/CVE-2023-2868CVE-2023-2868PoC · poc_in_github
cfielding-r7/poc-cve-2023-2868cfielding-r7/poc-cve-2023-2868PoC · poc_in_github
krmxd/CVE-2023-2868krmxd/CVE-2023-2868PoC · poc_in_github

affected products (12)

Products and version ranges known to be affected.

Barracuda Networks Email Security Gateway <= 9.2.0.006all versionscert_bundDEcpe:/a:barracuda:email_security_gateway:9.2.0.006
Barracuda Barracuda Email Security Gateway5.1.3.001 → 9.2.0.006enisa_euvdEU
Barracuda Networks, Inc. Email Security Gateway 3005.1.3.001 → 9.2.0.006fstec_bduRU
Barracuda Networks, Inc. Email Security Gateway 4005.1.3.001 → 9.2.0.006fstec_bduRU
Barracuda Networks, Inc. Email Security Gateway 6005.1.3.001 → 9.2.0.006fstec_bduRU
Barracuda Networks, Inc. Email Security Gateway 8005.1.3.001 → 9.2.0.006fstec_bduRU
Barracuda Networks, Inc. Email Security Gateway 9005.1.3.001 → 9.2.0.006fstec_bduRU
barracuda email security gateway 300 firmware5.1.3.001 → 9.2.0.006nvdUScpe:2.3:o:barracuda:email_security_gateway_300_firmware:*:*:*:*:*:*:*:*
barracuda email security gateway 400 firmware5.1.3.001 → 9.2.0.006nvdUScpe:2.3:o:barracuda:email_security_gateway_400_firmware:*:*:*:*:*:*:*:*
barracuda email security gateway 600 firmware5.1.3.001 → 9.2.0.006nvdUScpe:2.3:o:barracuda:email_security_gateway_600_firmware:*:*:*:*:*:*:*:*
barracuda email security gateway 800 firmware5.1.3.001 → 9.2.0.006nvdUScpe:2.3:o:barracuda:email_security_gateway_800_firmware:*:*:*:*:*:*:*:*
barracuda email security gateway 900 firmware5.1.3.001 → 9.2.0.006nvdUScpe:2.3:o:barracuda:email_security_gateway_900_firmware:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-1441Barracuda Networks Email Security Gateway: Schwachstelle ermöglicht CodeausführungDeutsch2023-06-12csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Barracuda Networks Email Security Gateway ausnutzen, um beliebigen Programmcode auszuführen.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd NVD CVE.org MITRE

published 2023-05-24modified 2026-06-17

related (4,597)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2026-96951US	high8.8OT critical	9.81% (96th)	KEV	2026-10-13
Improper neutralization of special elements used in a command ('command injection') in Windows Shell allows an unauthorized attacker to bypass a security feature over a network.
CVE-2026-105134US	critical10.0OT critical	81.8% (100th)	KEV	2026-10-04
A flaw has been found in Ahsay AhsayCBS up to 9.15.2.69/10.3.4.44. This vulnerability affects unknown code of the file /rps/api/json/UpdateReceivers.do of the component Replication…
CVE-2026-8037US	critical9.8OT critical	99.8% (100th)	KEV	2026-06-04
OS Command Injection Remote Code Execution Vulnerability in API in Progress ADC Products allows an un-authenticated attacker to execute arbitrary commands on the LoadMaster applian…
CVE-2026-42271US	high8.8OT critical	91.4% (100th)	KEV	2026-05-08
LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. From version 1.74.2 to before version 1.83.7, two endpoints used to preview an MCP server befo…
CVE-2026-22719US	—OT critical	18.3% (97th)	KEV	2026-02-25
VMware Aria Operations contains a command injection vulnerability. A malicious unauthenticated actor may exploit this issue to execute arbitrary commands which may lead to remote c…

+4592 more

references (8)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan